The Gyromatic Ref. 7317 was one of GPs best sellers and was a huge success in the late 1950s - early 60s. At first glance it is just another 3-hander, but there are many details (I mean, look a these case bevels!) that you only notice at a second glance that make this watch a true beauty and IMHO one of the best executions of the late 50s simple time-and-date models across all brands.